hello..

i seriously need a backbone point to point link (3 km).to feed my broadband users ..wht hardware and wht configuartion will u people suggest me to suplly internet for near about 150 coustomers..assuming that few users will hav 64 kpbs internet connection while few may go for 128 kbps and few for 256 kbps unlimted internet connection.

i will be very greatfull to u..

How much traffic does it need to handle?

Assuming you have clear LOS, I would say an RB411 on each end with XR5's and some 26 dbi antennas should get you something that would work well.

A real backhaul solution:
http://forum.mikrotik.com/viewtopic.php ... t=nstreme2

optimizing nstreme2:
http://forum.mikrotik.com/viewtopic.php ... t=nstreme2

If it helps , i have my main 32mbps full duplex trunk on Mikrotik PIII 866 2 cm9 and 27grid 5ghz, over 5 Kms and 800 clients. And my core router a P4 2ghz Mikrotik.....

regards
Dimas Perez